自己写得串口多线程控制程序，里面的超时设置和书上说得不是很一样，大家参考吧...

串行通信接口标准经过使用和发展，目前已经有几种。但都是在RS-232标准的基础上 经过改进而形成的。所以，以RS-232C为主来讨论。RS-323C 标准是美国EIA(电子工业联合 会）与BELL等公司一起开发的1969 年公布的通信协议。它适合于数据传输速率在0～ 20000b/s 范围内的通信。这个标准对串行通信接口的有关问题，如信号线功能、电器特性 都作了明确规定。由于通行设备厂商都生产与RS-232C制式兼容的通信设备，因此，它作为 一种标准，目前已在微机通信接口中广泛采用。-Serial communication interface standard through the use and development, now has several. However, in the RS-232 standard on the basis of an improved formed. So to the main RS-232C for discussion. RS-323C standard is the United States EIA (Electronics Industry Association) and BELL, such as the development of the company in 1969 with the publication of the communication protocol. It is suitable for data transfer rate at 0 ~ 20000b/s within the scope of communication. The standard serial communication interface of the relevant issues, such as signal line features, electrical characteristics have been clearly defined. Because of prevailing production and equipment manufacturers have standard RS-232C compatible communications equipment, t

常见的串口通信程序，用过使用C#语言，利用控件实现串口的实时通信-common serial communication program, used to use C# language, the use of controls to achieve the real-time serial communications

一个外置测控程序，帮助电脑处理传感器输入的数据和信息。-an external monitoring and control procedures to help the computer sensor input data and information.

实时串口操作动态库,dll的形式实现了串口实时操作-dynamic real-time operation of the serial, dll in the form of a serial real-time operation

vb串口编程电表读数 vb串口编程电表读数 vb串口编程电表读数

研华da采集例程-Advantech da collection routines

Ｃ５１单片机ＩＯ模拟串口，简洁明了，非本人写，好程序，大家共享-C51 microcontroller serial IO simulation, concise, non- I write the program, share

VB OMRON-PLC通讯源程 VB OMRON-PLC通讯源程 VB OMRON-PLC通讯源程-VB-PLC communications VB source-OMRON- PLC communications VB source-OMRON-PLC communications-source

空调数据多线程采集，包含多线程的使用，数据库操作，空调数据采集等功能-air-conditioned multi-threaded data collection, including the use of multi-threaded database operations, such as air-conditioning function data acquisition

用C++写的modbus串口通讯程序，供大家学习参考-C wrote Modbus serial communication program for all learning reference